# Is it safe to delete old Playwright Firefox builds?

- URL: https://moreroom.app/folders/playwright-firefox
- Item: Playwright Firefox (old versions)
- Location: `~/Library/Caches/ms-playwright` (items inside)
- Verdict: Safe to remove — Rebuilt or re-downloaded automatically when needed.
- Comes back on its own: yes
- Typical size: 200–500 MB per version
- Source: MoreRoom rules catalogue (2026-10-17), by Yando Pte. Ltd.

## What is it?

Playwright ships patched builds of Firefox for cross-browser testing and keeps them in `~/Library/Caches/ms-playwright` as `firefox-<build>` folders. Upgrading Playwright adds new builds; older ones can stay behind. Each is typically a few hundred MB.

## What happens if you delete it?

A removed build is downloaded again only if a project still needs that exact version and you run `npx playwright install`. The newest build is kept.

## How to remove it properly

Run `npx playwright uninstall` in a project to remove builds no installation still uses. Otherwise move the older `firefox-*` folders to the Trash in Finder (Go › Go to Folder… `~/Library/Caches/ms-playwright`).